WORLD Health Organization <br/><br/>
Sample size determination in health studies: a practical manual 

 - Geneva  World Health Organization  1991 
 - viii, 80 p. 
<br/><br/><label>ISBN: </label>9241544058 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Medical research
<br/><br/><label>Dewey Class. No.: </label>610.72  / WOR